Carlos Gurpegui Nausia (born in Pamplona, Spain)is a Spanish professional football player who plays as a defensive midfielder for Athletic Bilbao. He started his career at the Athletic de Bilbao's Lezama youth academy along with Baskonia. However, he was banned for two years for testing positive for nandrolone against Real Sociedad in 2002 , the ban was initially suspended. Nausia spent his entire professional career with Athletic Bilbao. Still, he played more than 221 games for Athletic Bilbao. In 2012, Carlos was chosen by Bielsa as his next player to be reconverted from defensive midfielder to central defender. Yet, he does not got an opportunity to play at the international level for his country.